Patients with congestive heart faliure may be interested in news that a kind of treatment has been developed by Fridley-based Medtronic. The device, which has receive preliminary FDA approval, is about the size of half a dollar, and it's surgically implanted in patients, much in the same manner as a pacemaker. Dr. Jay Cohn, at the U of M Medical School, says the device, called In-Sync, appears to be a big step forward for patients who have congestive heart faliure.